LG LHT754 - Home Theater System, Training Manual

Page 1: ...LG TRAINING MANUAL LHT754 Home Theater Fall 2007 ...

Page 2: ...eading must be infinite Any other abnormality that exists must be corrected before the receiver is returned to the customer Electrostatically Sensitive Devices Some semiconductor solid state devices can be damaged easily by static electricity Such components commonly are called Electrostatically Sensi tive ES Devices Examples of typical ES devices are integrated circuits and some field effect tran...

Page 3: ...OWER INTERFACE CIRCUIT DIAGRAM 22 MAIN MICOM CIRCUIT DIAGRAM 23 SERVO CIRCUIT DIAGRAM 24 I O SECTION DIAGRAM 25 MIC USB PTB CIRCUIT 26 TIMER CIRCUIT DIAGRAM 27 HDMI CIRCUIT DIAGRAM 28 XM READY CIRCUIT DIAGRAM 29 MPEG CIRCUIT DIAGRAM 30 DSP CIRCUIT DIAGRAM 31 AMP CIRCUIT DIAGRAM 32 WAVEFORMS 33 TROUBLESHOOTING 46 POWER SUPPLY 46 FRONT CIRCUIT 1 2 47 FRONT CIRCUIT 2 2 48 AMP PROTECTION 49 SYSTEM OPE...

Page 4: ...ic distortion audio 0 5 1 kHz at 1W position 20 kHz LPF VIDEO Video input 1 0 V p p 75 Ω negative sync RCA jack x 1 Video output 1 0 V p p 75 Ω negative sync RCA jack x 1 Component video out Y 1 0 V p p 75Ω negative sync RCA jack x 1 Pb Pr 0 7V p p 75Ω RCA jack x 1 TUNER FM Tuning Range 87 5 108 0 MHz or 65 0 74 0 MHz 87 5 108 0 MHz Intermediate Frequency 10 7 MHz Signal to Noise Ratio 60 dB Mono ...

Page 5: ...e 1 Way 1 Speaker 2 Way 3 Speaker 1 Way 1 Speaker Impedance 4 Ω 4 Ω 3 Ω Frequency Response 120 18000 Hz 80 18000 Hz 40 1500 Hz Sound Pressure Level 83 dB W 1m 83 dB W 1m 82 dB W 1m Rated Input Power 155 W 155 W 225 W Max Input Power 310 W 310 W 450 W Net Dimensions W x H x D 113 x 209 x 83 mm 450 x 161 x 102 mm 258 x 440 x 401 mm Net Weight 0 83 kg 1 8 kg 6 8 kg ...

Page 6: ...LHT 754 Home Theater in a Box Training Operation operation Front Panel Rear Panel ...

Page 7: ...djusts TV s volume INPUT Selects the TV s source TUNER AUX USB AUDIO OPEN CLOSE SOUND S TITLE CLEAR MENU SLEEP XM CH XM CH MUTE POWER INPUT CHANNEL VOL CAT HDMI XM MODE RESOL ZOOM SETUP ENTER DISPLAY RETURN VOL SCAN SKIP SCAN TITLE STOP PLAY REPEAT REPEATA B MARKER SEARCH DVD iPod POWER DIMMER PAUSE STEP PROG MEMO POWER TUNER Selects the System s tuner FM AM and XM bands AUX Selects input source U...

Page 8: ... the DVD CD Receiver to the VIDEO IN jack on the TV using the video cable supplied V Component Video Color Stream connection Connect the COMPONENT VIDEO OUT jacks from the DVD CD Receiver to the corresponding jacks on the TV using a Y PB PR cable C USB connection U Connect the USB port of USB Memory or MP3player etc to the USB port on the front of the unit ...

Page 9: ...A Connect an Output of auxiliary device to the AUX AUDIO Input L R Connector OPTICAL IN connection O Connect an optical output of DVD Player or Digital Device etc to the OPTICAL IN connector AUDIO IN connection D Connect a output of portable device MP3 or PMPetc to the AUDIO input connector iPod Connection Connect the iPod connector on the rear of the DVD CD Receiver to the dock connector of iPod ...

Page 10: ...ning Operation operation Antenna Connection Connect the AM Loop antenna to the AM antenna connector Connect the FM Wire antenna to the FM antenna connector Speaker System Connection Connect the speakers using the supplied speaker wires ...

Page 11: ...MI features include uncompressed digital video a bandwidth of up to 5 gigabytes per second one connector instead of several cables and connector and com munication between the AV source and AV devices such as DTVs HDMI the HDMI logo and High Definition Multimedia Interface are trademarks or registered trade marks of HDMI licensing LLC If you have a HDMI TV or monitor you can connect it to this DVD...

Page 12: ...ponent Video The component YPbPr video output is capable of supporting 480i 480p 720p and 1080i format video resolutions However since component video is an analog connection and thus cannot sup port HDCP copy protection 480p 720p and 1080i are not available for DVD playback Even if higher formats are selection the video output will automatically output at 480i during copy protected DVD playback H...

Page 13: ...ISC AUDIO SUBTITLE MENU Select the language you prefer for the audio track disc audio subtitles and the disc menu Original Refers to the original language in which the disc was recorded Other To select another language press numeric buttons and then ENTER to enter the corresponding 4 digit number If you enter the wrong language code press CLEAR ...

Page 14: ... 9 Select when a 16 9 wide TV is connected Display Mode The Display Mode setting works only when the TV aspect mode is set to 4 3 Letterbox Displays a wide picture with bands on the upper and lower portions of the screen Panscan Automatically displays the wide picture on the entire screen and then cuts off the portions that do not fit ...

Page 15: ...igital only Vocal Set Vocal to On only when a multi channel karaoke DVD is playing The karaoke channels on the disc will mix into normal stereo sound HD AV Sync When using a Digital TV Sometimes the AV signal can not be transmitted simultaneously because of later transmission of the video signal compared to the audio signal It takes some time to convert the analog video signal to a digital one in ...

Page 16: ...s 2 Use b B to select the desired speaker 3 Adjust options using v V b B buttons 4 Press ENTER to confirm your selection Returns to the previous menu Speaker selection Select a speaker that you want to adjust Front speaker Front L Front speaker Front R Center Speaker Center Subwoofer SubWoofer Rear speaker Rear L Rear speaker Rear R Size Since the speaker settings are fixed you cannot change the s...

Page 17: ... sound has to travel to reach your set listening point This allows the sound from each speaker to reach the listener at the same time Press b B to adjust the Distance of the selected speaker You can t adjust front Woofer speakers Test Press b B to test the signals of each speaker Adjust the volume to match the volume of test signals memorized in the system Front Left Front L Center Front Right Fro...

Page 18: ...ating selection then press SETUP to exit the menu Password You can enter or change password 1 Select Password on the LOCK menu and then press 2 Follow the step 2 as shown above Rating To change the password press ENTER when the Change or New option is highlighted Input a password and press ENTER Enter it again and press ENTER to verify 3 Press SETUP to exit the menu If you forget your password If ...

Page 19: ... on the DivX VOD service For more information visit www divx com vod 1 Select DivX R Registration option and then press 2 Press ENTER while Select is selected and the registration code will appear Use the registration code to purchase or rent the videos from DivX VOD service at www divx com vod Follow the instructions and download the video onto a disc for playback on this unit 3 Press ENTER to ex...

Page 20: ...LHT 754 Home Theater in a Box Training Circuit Descriptions Circuit descriptions 19 CIRCUIT DESCRIPTIONS MAIN BLOCK DIAGRAM IC2K1 IC4D1 IC201 IC202 IC502 IC503 IC506 IC301 IC401 IP9009A IC501 IC601 ...

Page 21: ...20 LHT 754 Home Theater in a Box Training Circuit Descriptions Circuit descriptions POWER KEY CIRCUIT DIAGRAM ...

Page 22: ...Box Training Circuit Descriptions 21 SMPS POWER CIRCUIT DIAGRAM NOTES Symbol denotes AC ground NOTES Symbol denotes DC chassis ground NOTE Warning NOTE Parts that are shaded are critical NOTE With respect to risk of fire or NOTE electricial shock 10 ...

Page 23: ...Circuit descriptions LHT 754 Home Theater in a Box Training Circuit Descriptions 22 POWER INTERFACE CIRCUIT DIAGRAM ...

Page 24: ...Circuit descriptions LHT 754 Home Theater in a Box Training Circuit Descriptions 23 MAIN MICOM CIRCUIT DIAGRAM ...

Page 25: ...Circuit descriptions LHT 754 Home Theater in a Box Training Circuit Descriptions 24 SERVO CIRCUIT DIAGRAM ...

Page 26: ...Circuit descriptions LHT 754 Home Theater in a Box Training Circuit Descriptions 25 I O SECTION DIAGRAM ...

Page 27: ...Circuit descriptions LHT 754 Home Theater in a Box Training Circuit Descriptions 26 MIC USB PTB CIRCUIT DIAGRAM ...

Page 28: ...Circuit descriptions LHT 754 Home Theater in a Box Training Circuit Descriptions 27 TIMER CIRCUIT DIAGRAM ...

Page 29: ...Circuit descriptions LHT 754 Home Theater in a Box Training Circuit Descriptions 28 HDMI CIRCUIT DIAGRAM ...

Page 30: ...Circuit descriptions LHT 754 Home Theater in a Box Training Circuit Descriptions 29 XM READY CIRCUIT DIAGRAM ...

Page 31: ...Circuit descriptions LHT 754 Home Theater in a Box Training Circuit Descriptions 30 MPEG CIRCUIT DIAGRAM ...

Page 32: ...Circuit descriptions LHT 754 Home Theater in a Box Training Circuit Descriptions 31 DSP CIRCUIT DIAGRAM ...

Page 33: ...Circuit descriptions LHT 754 Home Theater in a Box Training Circuit Descriptions 32 AMP CIRCUIT DIAGRAM ...

Page 34: ...LHT 754 Home Theater in a Box Training Circuit Descriptions Circuit descriptions 33 WAVEFORMS 1 SYSTEM 27MHz CLOCK RESET FLASH R W SIGNAL 1 ES8381 main clock at 27MHz X501 2 ES8381 reset is active high ...

Page 35: ...LHT 754 Home Theater in a Box Training Circuit Descriptions Circuit descriptions 34 3 Flash R W enable signal during download 2 SDRAM CLOCK 1 ES8381 main clock is at 27MHz X501 ...

Page 36: ...LHT 754 Home Theater in a Box Training Circuit Descriptions Circuit descriptions 35 3 TRAY OPEN CLOSE SIGNAL 1 Tray open close waveform 2 Tray close waveform ...

Page 37: ...LHT 754 Home Theater in a Box Training Circuit Descriptions Circuit descriptions 36 3 Tray open waveform 4 SLED CONTOL RELATED SIGNAL NO DISC CONDITION ...

Page 38: ...LHT 754 Home Theater in a Box Training Circuit Descriptions Circuit descriptions 37 5 LENS CONTROL RELATED SIGNAL NO DISC CONDITION 6 LASER POWER CONTOL RELATED SIGNAL NO DISC CONDITION ...

Page 39: ...LHT 754 Home Theater in a Box Training Circuit Descriptions Circuit descriptions 38 7 DISC TYPE JUDGEMENT WAVEFORMS ...

Page 40: ...LHT 754 Home Theater in a Box Training Circuit Descriptions Circuit descriptions 39 DISC TYPE JUDGEMENT WAVEFORMS Continued ...

Page 41: ...LHT 754 Home Theater in a Box Training Circuit Descriptions Circuit descriptions 40 8 FOCUS ON WAVEFORMS ...

Page 42: ...LHT 754 Home Theater in a Box Training Circuit Descriptions Circuit descriptions 41 9 SPINDLE CONTROL WAVEFORMS NO DISC CONDITION 10 TRACKING CONTROL RELATED SIGNAL SYSTEM CHECKING ...

Page 43: ... 754 Home Theater in a Box Training Circuit Descriptions Circuit descriptions 42 TRACKING CONTROL RELATED SIGNAL SYSTEM CHECKING Continued 11 ES8381 VIDEO OUTPUT WAVEFORMS 1 Full colorbar signal COMPOSITE ...

Page 44: ...LHT 754 Home Theater in a Box Training Circuit Descriptions Circuit descriptions 43 2 Y 12 AUDIO OUTPUT FROM PWM IC 1 Audio L R ...

Page 45: ...LHT 754 Home Theater in a Box Training Circuit Descriptions Circuit descriptions 44 2 Audio related Signal 13 DVD AMP WAVEFORMS 1 2 ...

Page 46: ...LHT 754 Home Theater in a Box Training Circuit Descriptions Circuit descriptions 45 3 4 5 6 FRONT CIRCUIT 1 2 ...

Page 47: ...LHT 754 Home Theater in a Box Training 46 Troubleshooting Troubleshooting TROUBLESHOOTING POWER SUPPLY ...

Page 48: ...ox Training 47 Troubleshooting Troubleshooting FRONT CIRCUIT 1 2 1 When it is needed to reconnect FFC cable into PN301 short pin 1 of PN103 with pin 18 of CN901 in amp 2 PN603 pins PIN1 35VKK PIN2 30FL PIN3 33FL PIN7 5V PIN13 5VA ...

Page 49: ...LHT 754 Home Theater in a Box Training 48 Troubleshooting Troubleshooting FRONT CIRCUIT 2 2 ...

Page 50: ...LHT 754 Home Theater in a Box Training 49 Troubleshooting Troubleshooting AMP PROTECTION ...

Page 51: ...LHT 754 Home Theater in a Box Training 50 Troubleshooting Troubleshooting SYSTEM OPERATION FLOW ...

Page 52: ...LHT 754 Home Theater in a Box Training 51 Troubleshooting Troubleshooting TEST DEBUG FLOW ...

Page 53: ...LHT 754 Home Theater in a Box Training 52 Troubleshooting Troubleshooting ...

Page 54: ...LHT 754 Home Theater in a Box Training 53 Troubleshooting Troubleshooting ...

Page 55: ...LHT 754 Home Theater in a Box Training 54 Troubleshooting Troubleshooting ...

Page 56: ...LHT 754 Home Theater in a Box Training 55 Troubleshooting Troubleshooting ...

Page 57: ...LHT 754 Home Theater in a Box Training 56 Troubleshooting Troubleshooting ...

Page 58: ...LHT 754 Home Theater in a Box Training 57 Troubleshooting Troubleshooting AUDIO MICOM CIRCUIT DVD AMP ...

Page 59: ... FB05K 6630XE00111 EAD35219301 PN103 6630XE00123 CN902 P4402 6630XE00109 561 711O 6630XE00120 CABLE4 EAD35201302 6630XE00120 6630XE01224 EAD35214501 EAD35219501 561 715N 561 661B 6630XE01224 6630XE00118 561 711C 6630R FB05R CABLE3 EAD35201502 CABLE 1 EAD35201101 CABLE2 EAD35632101 EAD35214501 EAD35219501 ...

Page 60: ...LHT 754 Home Theater in a Box Training 59 Disassembly disassembly EXPLODED VIEW MAIN FRAME ...

Page 61: ...LHT 754 Home Theater in a Box Training 60 Disassembly disassembly DECK MECHANISM EXPLODED VIEW ...

Page 62: ...61 ...

Page 63: ...2007 LHT754 Home Theater Training ...